Official Topper® Boom with new gooseneck fitting. Boom Assembly Fully Race Rigged – complete with 4:1 harken racing outhaul, blocks for mainsheet system (attached by a shackle at the clew end of the boom and the strop by 4mm Dyneema cord) 5mm shock cord is attached to the clew strop hook (for efficiency) and the Mylar sleeve for the centre mainsheet system is also included in this package. See also  Topper Boom G1/3 ALSO PLEASE CONTACT US IF YOU ARE LOOKING FOR OLDER  (school) BOOMS